controller: F7 atomic volume dumps + F6 no-single-copy + F5 stale-primary sweep (WIP, pre-build)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017CDMFpFx84pfviCTVuGGhf

controller/internal/backup/restore_points.go

@@ -58,16 +58,11 @@ func (m *Manager) ListRestorePoints(stackName string) (points []RestorePoint, fo
 	newest = newestArtifact(AppDBDumpPath(nsRoot, stackName), ".sql", newest)
 	newest = newestArtifact(AppVolumeDumpPath(nsRoot, stackName), ".tar", newest)
 
-	driveLabel := ""
-	if drive := m.GetAppDrivePath(stackName); drive != "" && drive != m.systemDataPath && m.settings != nil {
-		driveLabel = m.settings.GetStorageLabel(drive)
-	}
-
 	return []RestorePoint{{
 		Time:       newest.UTC().Format(time.RFC3339),
 		ShortID:    restorePointShortID,
 		Tier:       1,
-		DriveLabel: driveLabel,
+		DriveLabel: m.sysDriveLabelFor(stackName),
 	}}, true
 }